CVE-2025-42917: SAP HCM Privilege Escalation Vulnerability

CVE-2025-42917 Overview

CVE-2025-42917 is a missing authorization vulnerability in the SAP Human Capital Management (HCM) Approve Timesheets Fiori 2.0 application. The application fails to enforce authorization checks for authenticated users, enabling privilege escalation. An attacker with low-privileged credentials can manipulate timesheet approval workflows they should not have access to. The flaw affects the integrity of the application while leaving confidentiality and availability intact. SAP has published Security Note #3643832 to remediate the issue.

Critical Impact
An authenticated attacker with low privileges can escalate access and tamper with timesheet approval data, undermining payroll and workforce management integrity.

Affected Products

SAP HCM Approve Timesheets Fiori 2.0 application
SAP Fiori applications integrated with SAP HCM time management
SAP S/4HANA and ERP environments deploying the affected Fiori app

Discovery Timeline

2025-09-09 - CVE-2025-42917 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-42917

Vulnerability Analysis

The vulnerability resides in the SAP HCM Approve Timesheets Fiori 2.0 application, which exposes timesheet approval functionality through OData services consumed by the Fiori UI. The application authenticates users but does not verify whether the authenticated principal is authorized for the specific approval action or record being requested. This gap allows a standard authenticated user to invoke privileged operations reserved for managers or timekeeping administrators. The result is unauthorized modification of timesheet approval states, which can propagate into downstream payroll processing. The issue is classified as Missing Authorization [CWE-862].

Root Cause

The root cause is the absence of server-side authorization checks in the Fiori 2.0 application's backend service handlers. SAP applications typically rely on authorization objects and role-based checks enforced via AUTHORITY-CHECK statements or equivalent Fiori/OData authorization annotations. In the affected component, these checks are either missing or improperly scoped, allowing requests from any authenticated session to modify approval data.

Attack Vector

Exploitation requires network access to the SAP Fiori launchpad and valid low-privileged credentials. No user interaction is required beyond the attacker's own session. The attacker crafts OData requests against the Approve Timesheets service endpoint to approve, reject, or alter timesheet entries belonging to other users. Because the server does not validate the caller's authorization for the target record, the manipulation succeeds. The vulnerability is remotely exploitable but is not currently listed on the CISA Known Exploited Vulnerabilities catalog, and no public proof-of-concept is available.

Refer to SAP Note #3643832 for authoritative technical details.

Detection Methods for CVE-2025-42917

Indicators of Compromise

Unexpected timesheet approval or modification events in SAP HCM audit logs originating from non-manager user accounts.
Anomalous OData POST or PUT requests targeting the Approve Timesheets Fiori 2.0 service by users without approver roles.
Discrepancies between approved timesheet records and expected manager-of-record assignments.

Detection Strategies

Enable and review the SAP Security Audit Log (SM19/SM20) for authorization-relevant events on the Approve Timesheets service.
Correlate Fiori launchpad access logs with backend HR authorization objects to identify users invoking approval actions outside their role scope.
Baseline normal approval patterns per user and alert on deviations, such as approvals executed by users with no direct reports.

Monitoring Recommendations

Forward SAP audit logs and Fiori gateway logs to a centralized SIEM for continuous inspection.
Monitor OData service endpoints associated with HCM_TS_APV and related timesheet approval services for authorization failures and success anomalies.
Track changes to PA and PT time infotypes to detect unauthorized downstream modifications.

How to Mitigate CVE-2025-42917

Immediate Actions Required

Apply the patch referenced in SAP Note #3643832 as soon as change control allows.
Review user assignments for roles granting access to the Approve Timesheets Fiori 2.0 application and remove unnecessary entitlements.
Audit recent timesheet approval activity for evidence of unauthorized modifications by non-approver users.

Patch Information

SAP addressed CVE-2025-42917 through the SAP Security Patch Day release. Customers should apply the SAP Support Package or correction instructions detailed in SAP Note #3643832. See the SAP Security Patch Day Announcement for the full patch bundle and applicability guidance.

Workarounds

Restrict Fiori catalog and group assignments so that only designated approvers can launch the Approve Timesheets 2.0 tile.
Tighten backend authorization objects governing HCM time approvals until the patch is deployed.
Disable the Approve Timesheets Fiori 2.0 application on the Fiori launchpad if timely patching is not feasible and business processes permit.

bash

# Configuration example: restrict Fiori catalog access via PFCG role adjustment
# Remove the Approve Timesheets 2.0 catalog from broad end-user roles
# Transaction: PFCG
#   Role: ZBR_END_USER
#   Menu -> SAP Fiori Tile Catalog -> remove SAP_HCM_BC_EMP_TSA_APV_X1
# Then regenerate the profile and re-run user comparison (SU01 -> User Comparison)